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Showing 1 to 19 of 19 for “"ZFC"”.
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The impact of extrinsic rewards on employee motivation and organisational effectiveness : a case study of ZFC Limited in Zimbabwe
Submitted in fulfillment of the requirements for the Degree of Masters in Management Sciences Specialising in Human Resources Management, Durban University of Technology, Durban, South Africa, 2017.
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A relatively small turing machine whose behavior is independent of set theory
… value of n for which BB(n) is independent of ZFC. Is this n approximately 10, or closer to 1,000,000, or is it unfathomably large? In this thesis, I show that it is at most 340,943 by presenting an explicit description of a 340,943-state Turing machine Z with 1 tape and a 2-symbol alphabet …
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Borel Determinacy and Metamathematics
… in 1975, Borel determinacy is a theorem of ZFC set theory, and is, in fact, the best determinacy result in ZFC. However, the proof uses sets of high set theoretic type (N1 many power sets of ω). Friedman proved in 1971 that these sets are necessary by showing that the Axiom of Replacement is …
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The power function
The axioms of ZFC provide very little information about the possible values of the power function (i.e. the map K---->2ᴷ). In this dissertation, we examine various theorems concerning the behaviour of the power function inside the formal system ZFC , and we :;hall be p:trticul:trly interested in …
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The power function
The axioms of ZFC provide very little information about the possible values of the power function (i.e. the map K---->2ᴷ). In this dissertation, we examine various theorems concerning the behaviour of the power function inside the formal system ZFC , and we :;hall be p:trticul:trly interested in …
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Forcing ℵ1-free groups to be free.
… G is ℵ1-free in a countable transitive model of ZFC (and thus by absoluteness, in every transitive model of ZFC) if and only if it is free in some generic model extension. We would like to answer the more specific question of when an ℵ1-free group can be forced to be free while preserving the …
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Aspects of Large Cardinals (Set Theory, Logic, Measurable, Strongly Compact, Extendible)
… result concerning Boolean-valued measurability: ZFC (TURNST) ((FOR ALL)(kappa)) ((kappa) is Boolean-valued measurable whose target cBa is a field of sets (--->) (kappa) is measurable).
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The Structure of Models of Second-order Set Theories
… of T-realizations of a fixed countable model of ZFC, where T is a reasonable second-order set theory such as GBC or KM, showing that it has a rich structure. In particular, every countable partial order embeds into this structure. Moreover, we can arrange so that these embedding preserve the …
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Nanopartículas magnéticas em meio poroso
… é corroborada tanto pelas medidas de ZFC - FC quanto por medidas de histerese a temperaturas mais altas. Através do comportamento de Hc em função da temperatura foi possível estimar o tamanho médio das partículas. Os resultados estão em acordo com as medidas encontradas nas curvas de …
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Topological Ramsey Spaces, Associated Ultrafilters, and Their Applications to the Tukey Theory of Ultrafilters and Dedekind Cuts of Nonstandard Arithmetic
… that for each n < omega, it is consistent with ZFC that there exists a selective for Rn ultrafilter which is not Ramsey for Rn.</p> <p>In the second part, we extend results of Blass concerning Dedekind cuts associated to ultrafilter mappings from p-point and weakly-Ramsey ultrafilters to …
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Experimental and Simulation Studies of the Processing of Nanoscale Materials: Inert Gas Condensation and Ion Irradiation Methods
… temperatures (room temperature and below), FC/ZFC (field cooled/zero field cooled) measurements clearly show the randomizing effect of irradiation. The observed phase separation behavior of Cu-Co system under irradiation fits well with the predictions of the theoretical model of Enrique and …
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Synthesis and Characterization of Nanostructures in Porous Anodic Aluminum Oxide Templates
… 20 nm diameters and the hysteresis loops and FC-ZFC curves show superparamagnetic properties without the Morin transition. In the case of magnetite nanotubes, which consist of slightly larger nanoparticles, hysteresis loops show ferromagnetism with weak coercivity at room temperature while FC-ZFC …
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Sigma_n-correct Forcing Axioms
<p>I introduce a new family of axioms extending ZFC set theory, the Sigma_n-correct forcing axioms. These assert roughly that whenever a forcing name <em>a'</em> can be forced by a poset in some forcing class Gamma to have some Sigma_n property phi which is provably preserved by all further forcing …
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Set-theoretic and algebraic properties of certain families of real functions
… and Darboux functions is independent of ZFC axioms.;Chapter 3 is devoted entirely to the classes related to the concept of additivity. We introduce the definition of Hamel functions. We say that a real function is a Hamel function if its graph is a Hamel basis for the plane. Main result …
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Advanced Numerical Modelling of Bulk Superconductor Magnetisation
… during field-cooled (FC), or zero-field cooled (ZFC) magnetisation (which are quasi-static, energy intensive magnetisation techniques). Using numerical techniques in 3, flux jumps in bulk superconductors under FC & ZFC magnetisation are modelled, and validated against analytical solutions as well …
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Oscilação da magnetização magnetita/maghemita revestida com polianilina
… submetidos às análises magnéticas de VSM, FC-ZFC, DCD e IRM, e a analises estruturais e DRX e MEV. As observações indicaram um comportamento inusitado para algumas séries de nanocompósitos. A magnetização aumenta com o tempo de reação sob condições apropriadas, indicando uma transformação …
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Influencia de la morfología y estructura cristalina en las propiedades magnéticas de películas delgadas de Co
… histéresis a campos altos y de los ciclos FC y ZFC a 5 K permite concluir que los procesos de imanación a lo largo del eje difícil tienen lugar mediante rotación de la imanación a campos elevados seguido de desplazamiento de paredes a campos más bajos. La asimetría desaparece cuando se alcanza …
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An investigation into high temperature superconducting flux pump technology with the circular type magnetic flux pump devices and YBaCuO films
… conditions, such as zero-field cooling (ZFC), field cooling (FC), delta-shape trapped field, etc. A simulation based on the H-formulation using FEM software revealed that, after application of the travelling wave, the current density distribution inside the round shape YBCO sample was …